GitLab

ScrollingCoordinator accounts for some of the time in MainFrame
update time. Record how much.

As a side effect, move the macro for local frame UKM scoped recording
into the aggregator class so that it can be shared across classes.
This is to avoid relocating the UMA metric recording site in a way that
would skew the data toward zero, a lot.

R=pdr@chromium.org,rkaplow@chromium.org
BUG=910635

Change-Id: Id527efb7f30cc69de8ee45e27c616621059ef544
Reviewed-on: https://chromium-review.googlesource.com/c/1356888
Commit-Queue: Stephen Chenney <schenney@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612880}